CN106519482A - Metakaolin cable insulation packing and preparation method thereof - Google Patents
Metakaolin cable insulation packing and preparation method thereof Download PDFInfo
- Publication number
- CN106519482A CN106519482A CN201610920223.9A CN201610920223A CN106519482A CN 106519482 A CN106519482 A CN 106519482A CN 201610920223 A CN201610920223 A CN 201610920223A CN 106519482 A CN106519482 A CN 106519482A
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- kaolin
- metakaolin
- filter cake
- cable insulation
- particle
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
Abstract
The invention belongs to the technical field of cable packings and particularly relates to a metakaolin cable insulation packing and a preparation method thereof. The metakaolin cable insulation packing is prepared from, by weight, 90-110 parts of PVC resin, 45-55 parts of plasticizer, 5-7 parts of stabilizer and 6-10 parts of metakaolin. The metakaolin is obtained through dry kaolin powder preparation, kaolin heat activation, depolymerization of the heat activated kaolin and the like. According to the metakaolin cable insulation packing and the preparation method of the packing, suitable and optimized process parameters such as kaolin calcining temperature, standing time and the like are found out, metakaolin modification is achieved in the efficient depolymerization and dispersion process, and the metakaolin is prepared, serves as a cable packing and has very good mechanical strength and electrical strength.
Description
Technical field
The invention belongs to cable filler technical field, more particularly to a kind of metakaolin cable insulation filler and its preparation side
Method.
Background technology
China is kaolin resource big country, and there is abundant kaolin resource especially Period In Maoming Area, but in kaolin
It is also in urgent need of strengthening in terms of resources effective utilization and new material exploitation.
In recent years, of new generation high activity auxiliary gel rubber material grinding abroad of the metakaolin as cement concrete engineering
Study carefully and just enliven increasingly with application；Although and have some research work at home, it is very rare in engineer applied.For higher
The production Technology and industrialized implementation of ridge soil, is even more rarely reported.
The content of the invention
For solving the deficiencies in the prior art, the invention provides a kind of kaolin cable insulation filler and preparation method thereof.
The technical scheme carries out deep processing through techniques such as proper temperature calcining, efficient depolymerization dispersions to kaolin resource, can prepare
It is used as cable filler with pozzolanic properties and metakaolin, short with setting time, early strength is high, compensation is shunk, to steel
Muscle non-corroding, the features such as resistivity is high, kaolin resource added value is lifted, the market space has a high potential.
Technical scheme provided by the present invention is as follows：
A kind of metakaolin cable insulation filler, including each component of following weight portion：90～110 parts of polyvinyl chloride resin, plasticising
45～55 parts of agent, 5～7 parts of stabilizer, 6～10 parts of metakaolin.
Preferably, the metakaolin is prepared by following steps：
1) the kaolin filter cake that solid content is 60～70% is prepared, particle diameter is below two microns in the kaolin filter cake
The content of kaolin particle accounts for more than the 85wt% of kaolin particle in the kaolin filter cake；
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -200pa～-100pa tiny structures for obtaining, obtain
Kaolin dry powder of the moisture content below 2.5%；
3) to step 2) kaolin dry powder that obtains calcines, and calcining heat is 700～900 DEG C, and calcination time is 1.0
～2.0 hours, obtain thermal activation kaolin；
4) by step 3) obtained by the thermal activation kaolin carry out depolymerization, eliminate the sintering group produced during high-temperature calcination
Poly- caking, obtains metakaolin.
It is furthermore preferred that step 1) in, the preparation method of described kaolin filter cake is：By the height that solid content is 10～15%
Ridge soil ore pulp is classified and is settled, and accounts for the content of kaolin particle of the particle diameter below two microns in the kaolin ore slurry
More than the 85wt% of kaolin particle in the kaolin ore slurry, then kaolin ore slurry is concentrated into into solid content for 20～25%,
By the kaolin ore slurry press filtration after concentration, the kaolin filter cake that the solid content is 60～70% is obtained.
It is furthermore preferred that step 3) in, the calcining heat is 750～880 DEG C, and calcination time is 75min～100min.
Further, the metakaolin is prepared by following steps：
1) the kaolin filter cake that solid content is 62～68% is prepared, particle diameter is below two microns in the kaolin filter cake
The content of kaolin particle accounts for the 90wt～95wt% of kaolin particle in the kaolin filter cake；
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -200pa～-100pa tiny structures for obtaining, obtain
Kaolin dry powder of the moisture content below 2.0%；
3) using natural gas or liquefied petroleum gas as combustion medium calcining step 2) obtained by kaolin dry powder, calcining temperature
Spend for 700～900 DEG C, calcination time is 1.5～2 hours, obtains thermal activation kaolin；
4) by step 3) the thermal activation kaolin that obtains carries out depolymerization, and add borate in depolymehzation process and be coupled
Agent, the agglomeration of generation when eliminating high-temperature calcination are lumpd and increase kaolin powder surface-active, obtain metakaolin, its
In, the consumption of the boric acid ester coupler is 1.5～2.5% with the percentage by weight of the hot metakaolin.
Further, the step 1) in the preparation method of the kaolin filter cake be：By solid content be 10～
15% kaolin ore slurry is classified and is settled, and makes kaolin particle of the particle diameter below two microns in the kaolin ore slurry
Content account for more than the 85wt% of kaolin particle in the kaolin ore slurry, then with the concentrated sulfuric acid that weight/mass percentage composition is 98%
The pH to 2.0～3.0 of the kaolin ore slurry is adjusted, adds two sulfurous of company of the kaolin ore slurry solid content 5wt～8wt ‰
The stirring bleaching of sour sodium, control whiteness are concentrated into solid content for 20～25% more than 85%, then by kaolin ore slurry, will be after concentration
Kaolin ore slurry press filtration, obtain the filter cake that solid content is 55～60%, by the filter cake, filter cake 4wt～5wt ‰ six
Sodium metaphosphate, weight/mass percentage composition are 10% sodium polyacrylate solution mixing, poly- third in wherein described sodium polyacrylate solution
Olefin(e) acid sodium is 2～3 ‰ with the percentage by weight of the filter cake, and is adjusted with the sodium hydroxide solution that weight/mass percentage composition is 40%
Stir slurrying after pH to 6.0, through grinding, delaminate after slurrying, make in the ore pulp after the filter cake slurrying particle diameter two microns with
Under kaolin particle the ore pulp that accounts for after the filter cake slurrying of content in kaolin particle 90wt～95wt%, then will pass through
Grinding, the ore pulp press filtration delaminated to solid content are 64～67%, obtain kaolin filter cake.
Preferably, the step 3) in the calcining heat be 840～860 DEG C, calcination time be 75min～
100min。
Preferably, the step 4) in the boric acid ester coupler added in depolymehzation process consumption it is higher with the heat
The percentage by weight of ridge soil is 2.0%.
Present invention also offers the preparation method of above-mentioned metakaolin cable insulation filler, by 90～110 parts of PVC trees
Fat, 45～55 parts of plasticizer, the metakaolin of 5～7 parts of stabilizer and 6～10 parts are well mixed, and obtain metakaolin
Cable insulation filler.
Further, mixed under the conditions of 90～100 DEG C.
Beneficial effects of the present invention are：
Metakaolin cable insulation filler provided by the present invention and preparation method thereof is finding out suitable, optimization kaolinite
The technological parameters such as native calcination temperature, the time of staying, realize that in efficient depolymerization dispersion process metakaolin is modified, prepare higher
Ridge soil, as cable filler, with good mechanical strength and electrical strength.
Specific embodiment
Hereinafter the principle and feature of the present invention are described, example is served only for explaining the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment 1
1) pH value that solid content is 57% kaolin raw ore ore pulp is adjusted to 6.0 and adds calgon and polypropylene
Sour sodium dispersant, the calgon and Sodium Polyacrylate and kaolinic percentage by weight in the kaolin raw ore ore pulp
It is divided into 5 ‰ and 2 ‰, is stirred slurrying.Ore pulp is ground in super grinder after stirring slurrying, delaminated, gone forward side by side
One step filter-press dehydration is 65% to solid content, obtains kaolin filter cake.Wherein, in the kaolin raw ore ore pulp, granularity is micro- two
The content of the kaolin particle below rice accounts for the 95wt% of kaolin particle in the kaolin raw ore ore pulp.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter cyclone, cyclone overflow pulp is centrifuged via sleeping spiral shell grader again
Classification, kaolinite soil granularity can control less than two microns contents more than 85%.
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -150pa tiny structures for obtaining, obtain moisture content and exist
Less than 1.5% kaolin dry powder；
3) using natural gas as combustion medium calcining step 2) obtained by kaolin dry powder, calcining heat be 750 DEG C, forge
The burning time is 1.5 hours, obtains thermal activation kaolin；
4) to step 3) the thermal activation kaolin that obtains addition modifying agent boric acid ester coupler, the boric acid ester coupler uses
Measure the percentage by weight 2% with the metakaolin.And break up, depolymerization, eliminate high-temperature calcination when generation agglomeration knot
Block simultaneously makes kaolin powder surface active, obtains the metakaolin of powder.
5) by 110 parts of polyvinyl chloride resin, 45 parts of plasticizer, the metakaolin of 7 parts of stabilizer and 6 parts is in 100 DEG C of bars
It is well mixed under part, obtains metakaolin cable insulation filler 1.
Embodiment 2
1) pH value that solid content is 57% kaolin raw ore ore pulp is adjusted to 6.0 and adds calgon and polypropylene
Sour sodium dispersant, the calgon and Sodium Polyacrylate and kaolinic percentage by weight in the kaolin raw ore ore pulp
It is divided into 5 ‰ and 2 ‰, is stirred slurrying.Ore pulp is ground in super grinder after stirring slurrying, delaminated, gone forward side by side
One step filter-press dehydration is 65% to solid content, obtains kaolin filter cake, and wherein, in the kaolin raw ore ore pulp, granularity is micro- two
The content of the kaolin particle below rice accounts for the 95wt% of kaolin particle in the kaolin raw ore ore pulp.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter cyclone, cyclone overflow pulp is centrifuged via sleeping spiral shell grader again
Classification, kaolinite soil granularity can control less than two microns contents more than 85%.
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -150pa tiny structures for obtaining, obtain moisture content and exist
Less than 1.5% kaolin dry powder；
3) using natural gas as combustion medium calcining step 2) obtained by kaolin dry powder, calcining heat be 750 DEG C, forge
The burning time is 1.5 hours, obtains thermal activation kaolin；
4) to step 3) the thermal activation kaolin that obtains addition modifying agent boric acid ester coupler, the boric acid ester coupler uses
Measure the percentage by weight 2% with the metakaolin.And break up, depolymerization, eliminate high-temperature calcination when generation agglomeration knot
Block simultaneously makes kaolin powder surface active, obtains the metakaolin of powder.
5) by 90 parts of polyvinyl chloride resin, 55 parts of plasticizer, the metakaolin of 5 parts of stabilizer and 10 parts is in 90 DEG C of bars
It is well mixed under part, obtains metakaolin cable insulation filler 2.
Embodiment 3
1) by the kaolin ore slurry that the solid content after selected desanding is 12%, by hydrocyclone, sleeping spiral shell classification, make height
Below 2 microns of the ore pulp of soil of ridge, content reaches more than 85%；Video disc dewaterer is recycled to be concentrated into kaolin ore slurry solid content
25%；By the filter cake that concentration ore pulp press filtration to solid content is 65%.
Wherein, ore pulp is crossed after 75mm, 25mm millimeter cyclone, cyclone overflow, ore pulp again via sleeping spiral shell grader from
The heart is classified, and kaolinite soil granularity can control less than two microns contents more than 85%.
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -150pa tiny structures for obtaining, obtain moisture content and exist
Less than 1.5% kaolin dry powder.
3) using biologic grain as combustion medium calcining step 2) obtained by kaolin dry powder, calcining heat be 750 DEG C,
Calcination time is 1.5 hours, obtains thermal activation kaolin.
4) to step 3) the thermal activation kaolin that obtains addition modifying agent boric acid ester coupler, the boric acid ester coupler uses
Measure the percentage by weight 2% with the metakaolin.And break up, depolymerization, eliminate high-temperature calcination when generation agglomeration knot
Block simultaneously makes kaolin powder surface active, obtains the metakaolin of powder.
5) by 100 parts of polyvinyl chloride resin, 50 parts of plasticizer, the metakaolin of 6 parts of stabilizer and 8 parts is in 95 DEG C of bars
It is well mixed under part, obtains metakaolin cable insulation filler 3.
Effect example
The better embodiment of the present invention is the foregoing is only, not to limit the present invention, all spirit in the present invention
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of metakaolin cable insulation filler, it is characterised in that including each component of following weight portion：Polyvinyl chloride resin 90～
110 parts, 45～55 parts of plasticizer, 5～7 parts of stabilizer, 6～10 parts of metakaolin.
2. metakaolin cable insulation filler according to claim 1, it is characterised in that the metakaolin is by following step
Suddenly prepare：
1) the kaolin filter cake that solid content is 60～70% is prepared, kaolinite of the particle diameter below two microns in the kaolin filter cake
The content of soil particle accounts for more than the 85wt% of kaolin particle in the kaolin filter cake；
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -200pa～-100pa tiny structures for obtaining, obtain aqueous
Kaolin dry powder of the rate below 2.5%；
3) to step 2) kaolin dry powder that obtains calcines, and calcining heat is 700～900 DEG C, and calcination time is 1.0～
2.0 hours, obtain thermal activation kaolin；
4) by step 3) obtained by the thermal activation kaolin carry out depolymerization, eliminate the agglomeration that produces during high-temperature calcination
Caking, obtains metakaolin.
3. metakaolin cable insulation filler according to claim 2, it is characterised in that step 1) in, described kaolinite
The preparation method of native filter cake is：The kaolin ore slurry that solid content is 10～15% is classified and is settled, the kaolin is made
In ore pulp, the content of kaolin particle of the particle diameter below two microns accounts for the 85wt% of kaolin particle in the kaolin ore slurry
More than, then kaolin ore slurry is concentrated into into solid content for 20～25%, by the kaolin ore slurry press filtration after concentration, obtain described solid
Content is 60～70% kaolin filter cake.
4. metakaolin cable insulation filler according to claim 2, it is characterised in that：Step 3) in, the calcining temperature
Spend for 750～880 DEG C, calcination time is 75min～100min.
5. metakaolin cable insulation filler according to claim 2, it is characterised in that the metakaolin is by following step
Suddenly prepare：
1) the kaolin filter cake that solid content is 62～68% is prepared, kaolinite of the particle diameter below two microns in the kaolin filter cake
The content of soil particle accounts for the 90wt～95wt% of kaolin particle in the kaolin filter cake；
2) by step 1) kaolin filter cake flash distillation, drying under the conditions of -200pa～-100pa tiny structures for obtaining, obtain aqueous
Kaolin dry powder of the rate below 2.0%；
3) using natural gas or liquefied petroleum gas as combustion medium calcining step 2) obtained by kaolin dry powder, calcining heat is
700～900 DEG C, calcination time is 1.5～2 hours, obtains thermal activation kaolin；
4) by step 3) the thermal activation kaolin that obtains carries out depolymerization, and add boric acid ester coupler in depolymehzation process, disappear
Except the agglomeration of generation during high-temperature calcination lumps and increases kaolin powder surface-active, metakaolin is obtained, wherein, institute
The percentage by weight of the consumption and the hot metakaolin of stating boric acid ester coupler is 1.5～2.5%.
6. metakaolin cable insulation filler according to claim 5, it is characterised in that the step 1) in the height
Ridge soil filter cake preparation method be：The kaolin ore slurry that solid content is 10～15% is classified and is settled, the kaolinite is made
In native ore pulp, the content of kaolin particle of the particle diameter below two microns accounts for kaolin particle in the kaolin ore slurry
More than 85wt%, then the pH of the kaolin ore slurry is adjusted to 2.0～3.0 with the concentrated sulfuric acid that weight/mass percentage composition is 98%, add
Plus the sodium dithionite stirring bleaching of the kaolin ore slurry solid content 5wt～8wt ‰, whiteness is controlled more than 85%, then
Kaolin ore slurry is concentrated into into solid content for 20～25%, by the kaolin ore slurry press filtration after concentration, obtain solid content for 55～
60% filter cake, by the filter cake, the filter cake 4wt～calgon of 5wt ‰, poly- third that weight/mass percentage composition is 10%
Olefin(e) acid sodium solution mixes, in wherein described sodium polyacrylate solution the percentage by weight of Sodium Polyacrylate and the filter cake be 2～
3 ‰, and stir slurrying after adjusting pH to 6.0 with sodium hydroxide solution that weight/mass percentage composition is 40%, after slurrying through grinding,
Delaminate, make the content of kaolin particle of the particle diameter below two microns in the ore pulp after the filter cake slurrying account for the filter cake slurrying
90wt～the 95wt% of kaolin particle in ore pulp afterwards, then will pass through grinding, the ore pulp press filtration delaminated to solid content be 64～
67%, obtain kaolin filter cake.
7. metakaolin cable insulation filler according to claim 5, it is characterised in that：The step 3) in described forge
It is 840～860 DEG C to burn temperature, and calcination time is 75min～100min.
8. according to the arbitrary described metakaolin cable insulation filler of claim 5 to 7, it is characterised in that：The step 4) in
The percentage by weight of consumption and the hot metakaolin of the boric acid ester coupler added in depolymehzation process be 2.0%.
9. a kind of preparation method of metakaolin cable insulation filler, it is characterised in that by 90～110 parts of polyvinyl chloride resin, 45～
55 parts of plasticizer, the metakaolin of 5～7 parts of stabilizer and 6～10 parts are well mixed, and obtain metakaolin cable insulation
Filler.
10. the preparation method of metakaolin cable insulation filler according to claim 9, it is characterised in that 90～100
Mix under the conditions of DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857901A (en) * | 2017-10-26 | 2018-03-30 | 茂名高岭科技有限公司 | A kind of metakaolin gum filler and preparation method thereof |
| CN112143122A (en) * | 2019-06-27 | 2020-12-29 | 特变电工股份有限公司 | Heat-resistant environment-friendly flame-retardant cable insulating material and preparation method thereof |
| CN112778786A (en) * | 2020-12-31 | 2021-05-11 | 湖南万力工程科技有限公司 | High-strength environment-friendly scaffold pedal and preparation method thereof |
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
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| CN104045092A (en) * | 2014-06-26 | 2014-09-17 | 茂名高岭科技有限公司 | Method for preparing activated kaolin by washing kaolin with water |
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| CN101412834A (en) * | 2008-11-12 | 2009-04-22 | 江苏三角洲塑化有限公司 | High temperature resistant environment-protective polychloroethylene material for electric wire and cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857901A (en) * | 2017-10-26 | 2018-03-30 | 茂名高岭科技有限公司 | A kind of metakaolin gum filler and preparation method thereof |
| CN112143122A (en) * | 2019-06-27 | 2020-12-29 | 特变电工股份有限公司 | Heat-resistant environment-friendly flame-retardant cable insulating material and preparation method thereof |
| CN112778786A (en) * | 2020-12-31 | 2021-05-11 | 湖南万力工程科技有限公司 | High-strength environment-friendly scaffold pedal and preparation method thereof |
| CN113861726A (en) * | 2021-09-29 | 2021-12-31 | 广东宝丰陶瓷科技发展股份有限公司 | Preparation method for low-grade kaolin composite efficient activation modification |
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